實(shí)現(xiàn)視圖抖動(dòng)效果的思路

一精续、首先，如何讓視圖發(fā)生位移

UIView中定義了transform屬性箍铲，其類型為CGAffineTransform拨齐，默認(rèn)是CGAffineTransformIdentity
transform 改變位置/尺寸/旋轉(zhuǎn)角度，且是在原有transform的基礎(chǔ)上改變
①創(chuàng)建“基于控件初始位置”的形變

  CGAffineTransformMakeTranslation（平移）
  CGAffineTransformMakeScale（縮放）
  CGAffineTransformMakeRotation（旋轉(zhuǎn)）

②創(chuàng)建“基于transform參數(shù)”的形變

  CGAffineTransformTranslate
  CGAffineTransformScale
  CGAffineTransformRotate

補(bǔ)充：
在OC中盛嘿，所有跟角度相關(guān)的數(shù)值洛巢，都是弧度值，180° = M_PI
正數(shù)表示順時(shí)針旋轉(zhuǎn)
負(fù)數(shù)表示逆時(shí)針旋轉(zhuǎn)

二次兆、如何讓視圖的位移形成反復(fù)動(dòng)畫(huà)

在UIViewAnimationWithBlocks中提供了一系列的視圖動(dòng)畫(huà)
我們最常用的也就是下面三種：

+ (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^ __nullable)(BOOL finished))completion NS_AVAILABLE_IOS(4_0);

+ (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations completion:(void (^ __nullable)(BOOL finished))completion NS_AVAILABLE_IOS(4_0); // delay = 0.0, options = 0

+ (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations NS_AVAILABLE_IOS(4_0); // delay = 0.0, options = 0, completion = NULL

其中UIViewAnimationOptions枚舉值如下：

typedef NS_OPTIONS(NSUInteger, UIViewAnimationOptions) {
    UIViewAnimationOptionLayoutSubviews            = 1 <<  0, // 提交動(dòng)畫(huà)的時(shí)候布局子控件稿茉，表示子控件將和父控件一同動(dòng)畫(huà)
    UIViewAnimationOptionAllowUserInteraction      = 1 <<  1, // 動(dòng)畫(huà)時(shí)允許用戶交互
    UIViewAnimationOptionBeginFromCurrentState     = 1 <<  2, // 從當(dāng)前狀態(tài)開(kāi)始動(dòng)畫(huà)，而不是初始狀態(tài)
    UIViewAnimationOptionRepeat                    = 1 <<  3, // 動(dòng)畫(huà)無(wú)限重復(fù)
    UIViewAnimationOptionAutoreverse               = 1 <<  4, // 在動(dòng)畫(huà)可以重復(fù)的前提下芥炭，可執(zhí)行動(dòng)畫(huà)回路
    UIViewAnimationOptionOverrideInheritedDuration = 1 <<  5, // 忽略外層動(dòng)畫(huà)嵌套的執(zhí)行時(shí)間
    UIViewAnimationOptionOverrideInheritedCurve    = 1 <<  6, // 忽略外層動(dòng)畫(huà)嵌套的時(shí)間變化曲線
    UIViewAnimationOptionAllowAnimatedContent      = 1 <<  7, // animate contents (applies to transitions only)
    UIViewAnimationOptionShowHideTransitionViews   = 1 <<  8, // 用顯隱的方式替代添加移除圖層的動(dòng)畫(huà)效果
    UIViewAnimationOptionOverrideInheritedOptions  = 1 <<  9, // 忽略嵌套繼承的選項(xiàng)
    
    ///時(shí)間函數(shù)曲線相關(guān)
    UIViewAnimationOptionCurveEaseInOut            = 0 << 16, // 時(shí)間曲線函數(shù)漓库，由慢到快 default
    UIViewAnimationOptionCurveEaseIn               = 1 << 16, // 時(shí)間曲線函數(shù)，由慢到特別快
    UIViewAnimationOptionCurveEaseOut              = 2 << 16, //時(shí)間曲線函數(shù)园蝠，由快到慢
    UIViewAnimationOptionCurveLinear               = 3 << 16, //時(shí)間曲線函數(shù)渺蒿，勻速
    
    ///轉(zhuǎn)場(chǎng)動(dòng)畫(huà)相關(guān)的
    UIViewAnimationOptionTransitionNone            = 0 << 20, //無(wú)轉(zhuǎn)場(chǎng)動(dòng)畫(huà) default
    UIViewAnimationOptionTransitionFlipFromLeft    = 1 << 20, //轉(zhuǎn)場(chǎng)從左翻轉(zhuǎn)
    UIViewAnimationOptionTransitionFlipFromRight   = 2 << 20, //轉(zhuǎn)場(chǎng)從右翻轉(zhuǎn)
    UIViewAnimationOptionTransitionCurlUp          = 3 << 20, //上卷轉(zhuǎn)場(chǎng)
    UIViewAnimationOptionTransitionCurlDown        = 4 << 20, //下卷轉(zhuǎn)場(chǎng)
    UIViewAnimationOptionTransitionCrossDissolve   = 5 << 20, //轉(zhuǎn)場(chǎng)交叉消失
    UIViewAnimationOptionTransitionFlipFromTop     = 6 << 20, //轉(zhuǎn)場(chǎng)從上翻轉(zhuǎn)
    UIViewAnimationOptionTransitionFlipFromBottom  = 7 << 20, //轉(zhuǎn)場(chǎng)從下翻轉(zhuǎn)

    UIViewAnimationOptionPreferredFramesPerSecondDefault     = 0 << 24,
    UIViewAnimationOptionPreferredFramesPerSecond60          = 3 << 24,
    UIViewAnimationOptionPreferredFramesPerSecond30          = 7 << 24,
    
} NS_ENUM_AVAILABLE_IOS(4_0);

補(bǔ)充：關(guān)于最后一組轉(zhuǎn)場(chǎng)動(dòng)畫(huà)它一般是用在這個(gè)方法中的：

    [UIView transitionFromView: toView: duration: options: completion:^(BOOL finished) {}];

三、基礎(chǔ)了解完畢彪薛，上代碼

+ (void)shakeView:(UIView*)viewToShake {
    // 偏移值
    CGFloat t = 3.0;
    // 左搖
    CGAffineTransform translateLeft =CGAffineTransformTranslate(CGAffineTransformIdentity,-t,0.0);
    // 右晃
    CGAffineTransform translateRight  =CGAffineTransformTranslate(CGAffineTransformIdentity, t,0.0);
    // 執(zhí)行動(dòng)畫(huà) 重復(fù)動(dòng)畫(huà)且執(zhí)行動(dòng)畫(huà)回路
    viewToShake.transform = translateLeft;
    [UIView animateWithDuration:0.07 delay:0.0 options:UIViewAnimationOptionAutoreverse | UIViewAnimationOptionRepeat animations:^{
        // 設(shè)置重復(fù)次數(shù) repeatCount為float
        [UIView setAnimationRepeatCount:2.0];
        viewToShake.transform = translateRight;
        
    } completion:^(BOOL finished){
        if(finished){
            // 從視圖當(dāng)前狀態(tài)回到初始狀態(tài)
            [UIView animateWithDuration:0.05 delay:0.0 options:UIViewAnimationOptionBeginFromCurrentState animations:^{
                viewToShake.transform =CGAffineTransformIdentity;
            } completion:NULL];
        }
    }];
}